The people who built the ancient structure, members of what's called the Natufian culture, struggled in a "hostile environment to gain more energy from their food," said Ehud Weiss, an archaeobotanist at Bar-Ilan University in Israel who was not involved with the study. Archaeologists found the bread remains in sediment samples at a site named Shubayqa 1 in Jordan. The structure was oval with a fireplace in the center, and its builders carefully laid stones into the ground. Arranz Otaegui said she did not know whether the building was a dwelling or had other, perhaps ceremonial, purposes. Sifting through the...